There was definitely a lot of ideas flying around when it was brought up originally, so I'm with you on this one. How much would our sheets be allowed to vary from the central theme? I know that sounds weird but in the case of a specific character like Lucifer would they all need to be based on Lucifer and the whole fall from heaven or could we go for him as an angel? Perhaps him after the fall?
It's your choice. Considering that it might not be a Saber contest you might end up waiting a couple of months. (Wittgenstein Saber is prepared)